Climatology of the Arctic Planetary Boundary Layer and Temperature Inversion

北极行星边界层气候学和逆温

• 批准号: 8822472
• 负责人: Jonathan Kahl
• 金额: $ 6.52万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-07-15 至 1992-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8822472&HistoricalAwards=false
• 关键词: Climatology; Arctic; Planetary; Boundary; Layer

This project will compile a climatological data set of the temperature structure of the lower troposphere north of 65 deg N latitude with particular emphasis on the boundary layer depth and temperature inversion strength. Existing temperature soundings will be collated to produce a homogeneous arctic-wide data base. The lower tropospheric temperature inversion that is characteristic of the arctic exerts a substantial influence on many aspects of coupled arctic air-sea-ice processes by affecting, for example, the energy and momentum exchange, trace gas and pollutant dispersion, ice crystal formation, and boundary layer ozone destruction. Given the fact that climatic models predict that trace gas induced warming will be most pronounced in polar regions, climate changes may be most easily detectable in secular changes in the structure of the boundary layer. An understanding of the spatial and temporal scales of the arctic boundary layer characteristics is central to a number of atmospheric processes. The primary goal is to establish a single comprehensive data set from which to develop a representative climatology of arctic temperature inversions and boundary layer parameters. Rawinsonde data from land stations, ships, and ice islands, as well as aircraft dropsonde data will be analyzed to determine spatial and temporal trends of such parameters as inversion depth, inversion base, and vertical gradients of wind, temperature, and humidity.

这项计划将编制一套香港天文台的气候资料集， 65 ° N以北对流层低层温度结构 纬度，特别强调边界层深度， 逆温强度 现有的温度探测 将进行整理，以产生一个均匀的北极范围的数据库。 低对流层逆温， 北极地区的特点对北极地区产生了重大影响。 北极大气-海冰耦合过程的许多方面， 例如，能量和动量交换，痕量气体和 污染物扩散、冰晶形成和边界层 臭氧层破坏 鉴于气候模型预测 微量气体引起的变暖将在极地最明显 气候变化可能是最容易检测到的长期 边界层结构的变化。 的理解 北极边界层的空间和时间尺度 这些特征是许多大气过程的核心。 主要目标是建立一个单一的综合数据集 从中发展出一个具有代表性的北极气候学 逆温和边界层参数。 探空 来自陆地站、船舶和冰岛的数据，以及 将对飞机投下式探空仪的数据进行分析，以确定空间和 反演深度、反演深度、反演时间等参数的时间趋势 风、温度和湿度的垂直梯度。